Sash-bar for glass roofs.



A. WINDBKNBCHT. SASH BAB POR GLASS BOOFS. APP'LIUATIOEr :FILED JULY 16,1906.

Patented Jan.1s,191o.

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" 'sass-M roa'rm' mors.

man Einpllre,' i 'eiding at the city'o'fl Berlin,

usefulV mprove'ments in Sash-Barsf. f or Glass .B oofs'; 'and I doherebydeclare the following to be a full, cleargand exact descri tion of tli'e invention, s'uch'as-.will enable o hersv v skilled in theart to whichit appertains to,"

- make and use the saine.

if The' subject' of my invention is a novel sash-bar for glass roofs.,The essential con dition which ,from a ractical standpoint mustbe:fulfilled by suc sashbars,-in addition tocheapness, 1s lightness'combined with -great resistance to vertical and lateral bending; the sashlbars must also enable the glasses to be quickly fixed, whileallowing a in amount of'resilenoe; they must preai the entry ofrain-water and the drip of `;sweatwhich collects on 4the inside o f theroof; These conditions are only partly fullled by prior sash-bars.VV`The majority of the latter consist of shaped rolled iron; the greatweight and the relatively high price of which essentially Aincrease thecosts of the rooting.' Furthermore it is impossible to secure the withcapa ility of yielding 'unless springs are employed. With a View toavoiding great weightfand high price of the shaped #rolled iron,sash-bars of smooth rolled iron and sheet metal oi of sheet metal alone,have been manufactured. The former, however, differ but little in regardto weight and price from the sash-bars of shaped rolled 1min-while thelatter do, not possess sutlicient stability.

40 The new sash-bar forming the sub'ect of the inventonfconsists ofv astrip o sheet metal fashioned in a certain manner on the creasing orswaging machine, as the drawing shows, in which the new sash-bar isillustrated in section in connection-with two different kinds of devicesfr securing it.

The sash-bar consists essentially of a. broad crossweb a, combined withtwo vertical ribs b, forming in conjunction witli'the web tra deeptrough with side walls slightl inclined toward each other. Laterally othes'e side walls b are two vertical ribs d, connected with tlieforme'rby two shallow troughs c. The bottomedges of the vertical ribs d areoutwardly and upwardly bent and thus constitute troughs e which serve tocatch the lasses to a rolled iron' sash-bar Patented Jan. -18,'1910.

moisture which collects on the inside of the glass roof, while thetroughs o are destined V to receive the ackin material, e. g., 'felt'strips f, on w ich t e glasses rest. The

lasses lying oiithe so-shaped sash-barren e secured to itin variousways. One, extremely' practical manner of fixing is shown in F i ure 1'.The bolt h, projecting between the g asses, carries at its lower end afork,65

with outwardly bent prongs z', which lic against the inside of-tlielateral walls b o fl the central trough of the sash-bar b. Between theglasses and the nut 7c at the top of the bolt there is a packing-strip Zand above it a resilient strip of sheet-metal m, dis osed in well-knownmanner.' y

he essential advantages of the new sash# bar over prior ones are theextreme cheapness due tothe lowiprice of the material and the sim licityof the construction, and they extreme y light weight, combined withexceedingly great strength. For the vertical pressure is taken up byfour high vertical ribs b and d, the height of which', 480

and thus the stren h, can be readily in'- creased or decrease dependingu O n the extent of projection of the roof and t e load such as is notpossible with shaped rolled iron without a considerable additionalexpense. Lateral pressure is taken up by tive horizontal ribs, viz., thebroad riba, and the bases of the packing-ribs c and those of the troughsc.

A further essential advantage is the niitv ural resilience, obtained forthe first time by means of the new sash-bar and which renders itvaluable articularl'y' for open shed roofs. For if t-Eere is a strongwindpressure acting from below upon'the glasses, 96

such as is frequently the case with shed roofs, the glasses can rise alittle,`the prongs 1l of the bolt 11, pressing the ribs b s ight y apartand sliding u them. Any rainwater 'which may enter cs itethe packingdoes space, but is carried y o' bythe central trough b a b, which thusnot reach the covere acts as' an emergency trough.

Like the vertical rigidity, the lateral rig-- idity of the sash-bar alsocan'be increased or decreased without trouble or exiense, as desired,through suitably alteringt e le h ofthe ribs,- such as is. not possiblewith ro edironrribs. The ribs b and d can alsoV besof different len hs,without the essential advantages of -e sash-bar being affected.

Fig. 2 shows a simpler method of securing the glasses to the sashfbar,which at the same time does not interfere with the natural resilience ot'the central trough b ab. There are here riveted or soldered to theupper part of the ribs Z1 Z1 strips of sheet 'copper s, which simplypass between the glasses g and throufrhvslots in the packingstrips ZA m,above which they are bent over outwardly. ln order to prevent' theformaascertained the nat-ure ot' my said invention,

:ind in what manner the same is to be performed, l declare that what Iclaim is:

l. A sash-bar for glass roofs consisting of a` sheet metal trough withupwardly converging walls, plate-supporting flanges extending outwardlyon each side from the trough, and ribs extending downwardly from theouter edge ofthe flanges and uptui'ned at their lower extremities toforni supplemental troughs.

2. A sashsbar for glass roofs` consisting of a sheet metal trough withupwardly con-` verging wallss plate-supporting flanges extendingoutwardlyv en each side from the trough'. and provided with a shallowgroove,

and ribs extending downwardly from the outer edge of theflanges anduptuined at theirlower extremities to ferm supplemental troughs.

-3. n Combination, a sash-bar for glass roofs consisting of a sheetmetal trough,

'plate supporting flanges exten ing outwardly on each side of the troughand ribs extending downwardly from the outer edges of the flanges andupturned at their lowereidfremities, contiguous glass plates supportedby said flanges and yielding means for holding said gla'ss latesafliinst the flanges.

4f. A sas i-bar o resilient sheet metal having upwardly convergingsidewallsin conibination with a wedge-shaped piece fitting between theside walls, and means for drawing the wedge-shaped piece upward withr'espect to the sash bar.

5. A sash-bar of resilient sheet metal hav ing upwardly converging sidewalls and upper lateral flanges, 1n combination with a wedge-shapedpiece fitting between the side walls, glass plates restino on saidflanges. and means secured to -tie wedgeshaped piece for holding theglass plates against said flanges.

6. A sash-bar`0f resilient sheet metal having upwardly converging sidewalls, in combination with a wedge shaped piece ar- 4ranged infrictional4 en agement with the iiiner surfaces of the si e walls,whereby the walls are spread apart when the wedgeshaped piece is pulledu ward.

In testimony whereof hereunto alix my signature in the presence of twowitnesses.

' AUGUST `WINDEKNECHT. Witnesses

